I tend to use Core Phrases where possible, so in this case, I am using the core xf Phrase 'title'. You probably don't want to edit that phrase, so the only option would be to edit the 'xa_sc_item_edit_macros' template and change the phrase to either a custom phrase that you add yourself or just replace the phrase with text.
Edit the template: xa_sc_item_edit_macros
There are TWO macros that you will need to modify ('title_item_add' and 'title_item_edit'). These 2 macros are the first 2 macros in the template.
You will be replacing the placeholder in both macros.
As mentioned above, you can replace the existing phrase that is being used with a custom phrase like this:
Or you can remove the template syntax for calling a phrase and replace it with hard coded text like this: